STUDY CLIMATE CHANGE, ENERGY AND ENVIRONMENT SUSTAINABLE TRANSFORMATION OF YEMEN’S ENERGY SYSTEM Development of a Phase Model By applying a phase model for the renewables-based energy transition in the MENA countries to Yemen, the study provides a guiding vision to support the strategy development and steering of the energy transition process The»solar revolution« in Yemen is focused on small, decentralised applications and is mainly driven by energy scarcity as a result of the ongoing conflict. Sibel Raquel Ersoy, Julia Terrapon-Pfaff, Marwan Dhamrin and Abdulrahman Baboraik May 2022 A shift towards a sustainable energy system in Yemen could contribute to improving the humanitarian situation by pro­viding a secure and affordable electricity supply, achieving environmental benefits, and offering long-term economic opportunities.